| 1 Heol Islwyn, Tonyrefail, Porth | - | 58 m² | - |
| 2 Heol Islwyn, Tonyrefail, Porth | Freehold | 83 m² | £160,000 (2022) |
| 3, Heol Islwyn, Tonyrefail, Porth | Freehold | 92 m² | £55,000 (2004) |
| 4 Heol Islwyn, Tonyrefail, Porth | Freehold | 87 m² | £170,000 (2024) |
| 5 Heol Islwyn, Tonyrefail, Porth | Freehold | 84 m² | £150,000 (2023) |
| 6 Heol Islwyn, Tonyrefail, Porth | - | 72 m² | - |
| 8 Heol Islwyn, Tonyrefail, Porth | Freehold | 82 m² | £140,000 (2024) |
| 9 Heol Islwyn, Tonyrefail, Porth | Freehold | 93 m² | £80,000 (2014) |
| 10 Heol Islwyn, Tonyrefail, Porth | - | 72 m² | - |
| 11, Heol Islwyn, Tonyrefail, Porth | Freehold | 85 m² | £29,950 (1997) |
| 14, Heol Islwyn, Tonyrefail, Porth | Freehold | 92 m² | £110,000 (2019) |
| 15 Heol Islwyn, Tonyrefail, Porth | - | 75 m² | - |
| 17 Heol Islwyn, Tonyrefail, Porth | - | 78 m² | - |
| 18 Heol Islwyn, Tonyrefail, Porth | - | 79 m² | - |
| 19 Heol Islwyn, Tonyrefail, Porth | - | 74 m² | - |
| 20 Heol Islwyn, Tonyrefail, Porth | Freehold | 89 m² | £150,000 (2023) |
| 21 Heol Islwyn, Tonyrefail, Porth | - | 94 m² | - |
| 22 Heol Islwyn, Tonyrefail, Porth | Freehold | 101 m² | £100,000 (2011) |
| 23, Heol Islwyn, Tonyrefail, Porth | Freehold | 66 m² | £64,000 (2013) |
| 24 Heol Islwyn, Tonyrefail, Porth | - | 82 m² | - |
| 25 Heol Islwyn, Tonyrefail, Porth | Freehold | 80 m² | £100,000 (2024) |
| 26 Heol Islwyn, Tonyrefail, Porth | Freehold | 115 m² | £191,000 (2024) |
| 27, Heol Islwyn, Tonyrefail, Porth | - | 81 m² | - |
| 29 Heol Islwyn, Tonyrefail, Porth | - | 75 m² | - |
| 31 Heol Islwyn, Tonyrefail, Porth | - | 75 m² | - |
| 32 Heol Islwyn, Tonyrefail, Porth | - | 83 m² | - |
| 33 Heol Islwyn, Tonyrefail, Porth | Freehold | 77 m² | £66,000 (2015) |
| 35, Heol Islwyn, Tonyrefail, Porth | - | 85 m² | - |
| 37 Heol Islwyn, Tonyrefail, Porth | Freehold | 89 m² | £152,000 (2025) |
| 38 Heol Islwyn, Tonyrefail, Porth | - | 72 m² | - |
| 39 Heol Islwyn, Tonyrefail, Porth | - | 77 m² | - |
| 41, Heol Islwyn, Tonyrefail, Porth | Freehold | 78 m² | £125,000 (2023) |
| 42, Heol Islwyn, Tonyrefail, Porth | Freehold | 76 m² | £78,000 (2012) |
| 45, Heol Islwyn, Tonyrefail, Porth | - | 107 m² | - |
| 46 Heol Islwyn, Tonyrefail, Porth | - | 91 m² | - |